(1) You can log in to the mobile phone business hall APP of Unicom, and click Services > Handling > Basic Business Handling > Early Warning SMS Reminder on the home page; Follow the prompts on the page options.
(2) you can log in to Unicom's online business hall and click "handle" > "handle other business" > "SMS reminder" on the home page; Follow the prompts on the page options.
Tips:
1. The above paths are subject to the information actually displayed on the query page.
2. Due to the differences of commercial policies in different cities, the local policies shall prevail.